An optical imaging lens

Abstract

The present application discloses an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with negative optical power, whose object side surface is concave; a second lens; a third lens with negative optical power; a fourth lens with positive optical power, whose object side surface is concave and the image side surface is convex; a fifth lens; wherein there is an air gap between adjacent lenses; wherein the lens material of the fourth lens and / or the fifth lens is glass or molded glass; wherein the maximum field of view FOV of the optical imaging lens satisfies: FOV>115°. The optical imaging lens provided by the present application includes multiple lenses, such as the first lens to the fifth lens. On the one hand, it can achieve a large angular resolution, a wider field of view at the same focal length, a glass material, stable temperature drift, stable structure, stable assembly structure during installation, and high imaging quality; on the other hand, it enables the optical imaging lens to have a large depth of field, while the imaging clarity meets the requirements, and better chromatic aberration correction is achieved.

Description

Technical Field

[0001] The present application belongs to the field of optical imaging lenses, and in particular, relates to an optical imaging lens composed of five lenses. Background Art

[0002] With the continuous improvement of the requirements for camera quality, a single camera module can no longer meet user needs. Currently, devices such as smartphones are equipped with multiple lens modules to meet different usage environments. Among them, the wide-angle camera module is deeply loved by users for its wide viewing angle, large depth of field, large perspective effect, and small image. The current shortest focal length of the wide-angle lens has reached 4 mm, which can capture a panoramic view of a person with a height of 1.8 meters who is 1 meter away from the camera.

[0003] With the continuous development of mobile phone lenses, large image plane, telephoto and wide angle have become the standard configuration of major manufacturers, and the actual use of wide-angle lenses has also received more and more attention. Limited by the small size, light weight and easy to carry characteristics of wide-angle lenses, the existing technology achieves a shorter focal length when making optical imaging lenses achieve a wider field of view, resulting in poor structural stability of the lens and difficulty in installation.

[0004] Therefore, in order to solve the above problems, the present application proposes a wide-angle lens made of glass material, which ensures that the lens structure is stable during installation and has high imaging quality.

[0005] As semiconductor process technology becomes more advanced, the performance of electronic photosensitive elements has been improved, and the pixel size of photosensitive elements must also be reduced to improve resolution. Therefore, optical lenses with high imaging quality have become an indispensable part.

[0006] The foregoing description is intended to provide general background information and does not necessarily constitute prior art.

[0007] Application Contents

[0008] The present application aims to provide an optical imaging lens composed of five lenses, which, on the basis of ensuring the lens structure problems, makes the assembly structure stable during installation and has high imaging quality.

[0009] The present application provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis:

[0010] A first lens having negative optical power, whose object side surface is concave;

[0011] Second lens;

[0012] a third lens having negative optical power;

[0013] a fourth lens element having positive refractive power, whose object side surface is concave and image side surface is convex;

[0014] The fifth lens;

[0015] Wherein, there is an air gap between adjacent lenses;

[0016] Wherein, the lens material of the fourth lens and / or the fifth lens is glass or molded glass;

[0017] Among them, the maximum field of view FOV of the optical imaging lens satisfies: FOV>115°.

[0018] According to one embodiment of the present application, the on-axis distance TTL from the object side of the first lens to the imaging plane and half the diagonal length of the effective pixel area on the imaging plane ImgH satisfy: 1.5≦TTL / ImgH≦2.0.

[0019] According to one embodiment of the present application, an air interval T34 between the third lens and the fourth lens on the optical axis and an air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy:

[0020] 1.4≦T34 / T45≦3.0.

[0021] According to one embodiment of the present application, an air interval T12 between the first lens and the second lens on the optical axis, an air interval T34 between the third lens and the fourth lens on the optical axis, and an air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.0≦T12 / (T34+T45)≦2.0.

[0022] According to one embodiment of the present application, the effective focal length f of the optical imaging lens, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy: 1.2≦(f4-f5) / f≦3.5.

[0023] According to one embodiment of the present application, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the curvature radius R8 of the image side surface of the fourth lens, and the curvature radius R9 of the object side surface of the fifth lens satisfy: 2.0≦|f4 / R8|+|f5 / R9|≦5.0.

[0024] According to one embodiment of the present application, a curvature radius R7 of the object side surface of the fourth lens and a curvature radius R8 of the image side surface of the fourth lens satisfy: 1.5≦(R7+R8) / (R7-R8)≦3.0.

[0025] According to one embodiment of the present application, a center thickness CT3 of the third lens on the optical axis and a center thickness CT5 of the fifth lens on the optical axis satisfy: 1.5≦CT5 / CT3≦3.0.

[0026] According to one embodiment of the present application, the sum ΣAT of the air intervals on the optical axis between any two adjacent lenses having optical power between the first lens to the fifth lens and the sum ΣCT of the center thicknesses of all the lenses on the optical axis satisfy: 2.5≦ΣCT / ΣAT≦3.8.

[0027] According to one embodiment of the present application, the effective focal length f5 of the fifth lens and the curvature radius R10 of the image-side surface of the fifth lens satisfy: 2.0≦|f5 / R10|≦5.0.

[0028] According to one embodiment of the present application, the effective focal length f of the optical imaging lens and half of the maximum field of view Semi-FOV of the optical imaging lens satisfy: 3.5≦f×tan(Semi-FOV)≦4.3.

[0029] According to one embodiment of the present application, the maximum effective radius SD11 of the object-side surface of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy: 3.5≦SD11 / CT1≦5.0.

[0030] According to one embodiment of the present application, the distance SD from the aperture to the image side surface of the fifth lens, the axial distance TTL from the object side surface of the first lens to the imaging surface, the effective focal length f of the optical imaging lens, and the entrance pupil diameter EPD of the optical imaging lens satisfy: 8.5≦SD×TTL / (f×EPD)≦10.0.

[0031] According to one embodiment of the present application, a vertical distance Yc31 between the inflection point of the object side surface of the third lens and the optical axis and a center thickness CT3 of the third lens on the optical axis satisfy: 1.0≦Yc31 / CT3≦1.6.

[0032] The present application also provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis:

[0033] A first lens having negative optical power, whose object side surface is concave;

[0034] Second lens;

[0035] a third lens having negative optical power;

[0036] a fourth lens having positive refractive power, whose object-side surface is concave and whose image-side surface is convex;

[0037] The fifth lens;

[0038] Wherein, there is an air gap between adjacent lenses;

[0039] Wherein, half of the maximum field of view angle Semi-FOV of the optical imaging lens satisfies: Semi-FOV>55°;

[0040] The Abbe number V4 of the fourth lens and the Abbe number V5 of the fifth lens satisfy: 20 <V4-V5<40。

[0041] According to one embodiment of the present application, the on-axis distance TTL from the object side of the first lens to the imaging plane and half the diagonal length of the effective pixel area on the imaging plane ImgH satisfy: 1.5≦TTL / ImgH≦2.0.

[0042] According to one embodiment of the present application, an air interval T34 between the third lens and the fourth lens on the optical axis and an air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy:

[0043] 1.4≦T34 / T45≦3.0.

[0044] According to one embodiment of the present application, an air interval T12 between the first lens and the second lens on the optical axis, an air interval T34 between the third lens and the fourth lens on the optical axis, and an air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.0≦T12 / (T34+T45)≦2.0.

[0045] According to one embodiment of the present application, the effective focal length f of the optical imaging lens, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy: 1.2≦(f4-f5) / f≦3.5.

[0046] According to one embodiment of the present application, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the curvature radius R8 of the image side surface of the fourth lens, and the curvature radius R9 of the object side surface of the fifth lens satisfy: 2.0≦|f4 / R8|+|f5 / R9|≦5.0.

[0047] According to one embodiment of the present application, a curvature radius R7 of the object side surface of the fourth lens and a curvature radius R8 of the image side surface of the fourth lens satisfy: 1.5≦(R7+R8) / (R7-R8)≦3.0.

[0048] According to one embodiment of the present application, a center thickness CT3 of the third lens on the optical axis and a center thickness CT5 of the fifth lens on the optical axis satisfy: 1.5≦CT5 / CT3≦3.0.

[0049] According to one embodiment of the present application, the sum ΣAT of the air intervals on the optical axis between any two adjacent lenses having optical power between the first lens to the fifth lens and the sum ΣCT of the center thicknesses of all the lenses on the optical axis satisfy: 2.5≦ΣCT / ΣAT≦3.8.

[0050] According to one embodiment of the present application, the effective focal length f5 of the fifth lens and the curvature radius R10 of the image-side surface of the fifth lens satisfy: 2.0≦|f5 / R10|≦5.0.

[0051] According to one embodiment of the present application, the effective focal length f of the optical imaging lens and half of the maximum field of view Semi-FOV of the optical imaging lens satisfy: 3.5≦f×tan(Semi-FOV)≦4.3.

[0052] According to one embodiment of the present application, the maximum effective radius SD11 of the object-side surface of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy: 3.5≦SD11 / CT1≦5.0.

[0053] According to one embodiment of the present application, the distance SD from the aperture to the image side surface of the fifth lens, the axial distance TTL from the object side surface of the first lens to the imaging surface, the effective focal length f of the optical imaging lens, and the entrance pupil diameter EPD of the optical imaging lens satisfy: 8.5≦SD×TTL / (f×EPD)≦10.0.

[0054] According to one embodiment of the present application, a vertical distance Yc31 between the inflection point of the object side surface of the third lens and the optical axis and a center thickness CT3 of the third lens on the optical axis satisfy: 1.0≦Yc31 / CT3≦1.6.

[0055] Beneficial effects of this application:

[0056] The optical imaging lens provided by the present application includes multiple lenses, such as the first lens to the fifth lens. On the one hand, it can achieve a large angular resolution, a wider field of view at the same focal length, glass material, stable temperature drift, stable structure, stable assembly structure during installation, and high imaging quality; on the other hand, it enables the optical imaging lens to have a large depth of field, while the imaging clarity meets the requirements, and achieves better chromatic aberration correction. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0058] Figure 1 This is a schematic diagram of the lens group structure of Embodiment 1 of the optical imaging lens of the present application;

[0059] Figure 2a to Figure 2c They are respectively the axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens embodiment 1 of the present application;

[0060] Figure 3 This is a schematic diagram of the lens group structure of Embodiment 2 of the optical imaging lens of the present application;

[0061] Figures 4a to 4c They are respectively the axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens embodiment 2 of the present application;

[0062] Figure 5 This is a schematic diagram of the lens group structure of Embodiment 3 of the optical imaging lens of the present application;

[0063] Figures 6a to 6c They are respectively the axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens embodiment 3 of the present application;

[0064] Figure 7 This is a schematic diagram of the lens group structure of Embodiment 4 of the optical imaging lens of the present application;

[0065] Figures 8a to 8c They are respectively the axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens embodiment 4 of the present application;

[0066] Fig. 9 This is a schematic diagram of the lens group structure of Embodiment 5 of the optical imaging lens of the present application;

[0067] Figures 10a to 10c They are respectively the axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens embodiment 5 of the present application. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0069] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0070] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0071] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0072] In the description of this application, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region. If the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging surface is called the image side of the lens.

[0073] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal way unless explicitly defined in this article.

[0074] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The features, principles and other aspects of the present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0075] Exemplary Embodiments

[0076] The exemplary optical imaging lens of the present application includes five lenses, which sequentially include, from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. Among them, each lens is independent of each other, and there is an air gap between each lens on the optical axis.

[0077] In this exemplary embodiment, the optical imaging lens includes: a first lens with a negative focal power, whose object side surface is concave; a second lens with a focal power; a third lens with a negative focal power; a fourth lens with a positive focal power, whose object side is concave and image side is convex; a fifth lens with a focal power.

[0078] Among them, the lens material of at least one of the fourth lens or the fifth lens is glass or molded glass; in this embodiment, preferably GM (molded glass) material is adopted. Adopting GM (molded glass) material can make the temperature drift of the lens stable, the structure stable, and the assembly structure stable during installation, and the imaging quality is high.

[0079] Among them, the maximum field of view FOV of the optical imaging lens satisfies: FOV > 115°. It can enable the lens to achieve high angular resolution and a wider field of view in the same focal length range. More specifically, the maximum field of view FOV of the optical imaging lens satisfies: FOV > 115.01°.

[0080] In this exemplary embodiment, the optical imaging lens includes: a first lens with a negative focal power, whose object side surface is concave; a second lens with a focal power; a third lens with a negative focal power; a fourth lens with a positive focal power, whose object side surface is concave and its image side is convex; a fifth lens with a focal power.

[0081] Among them, half of the maximum field of view of the optical imaging lens, Semi - FOV, satisfies: Semi - FOV > 55°. The Abbe number V4 of the fourth lens and the Abbe number V5 of the fifth lens satisfy: 20 < V4 - V5 < 40. By adjusting the Abbe numbers of the fourth lens and the fifth lens, better chromatic aberration correction can be achieved.

[0082] In the exemplary embodiment of the present application, the on - axis distance TTL from the object side surface of the first lens to the imaging surface and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy: 1.5 ≤ TTL / ImgH ≤ 2.0. By adjusting the ratio value of TTL and ImgH, the optical imaging lens can have a larger depth of field while the imaging clarity meets the requirements. More specifically, the on - axis distance TTL from the object side surface of the first lens to the imaging surface and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy: 1.51 ≤ TTL / ImgH ≤ 1.99.

[0083] In the exemplary embodiment of the present application, the air interval T34 between the third lens and the fourth lens on the optical axis and the air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.4≦T34 / T45≦3.0. By reasonably adjusting the specific values ​​of the air intervals between the above lenses, the radial size of the lens can be further controlled to achieve the miniaturization of the optical lens group for photography. More specifically, the air interval T34 between the third lens and the fourth lens on the optical axis and the air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.41≦T34 / T45≦2.99.

[0084] In an exemplary embodiment of the present application, the air spacing T12 between the first lens and the second lens on the optical axis, the air spacing T34 between the third lens and the fourth lens on the optical axis, and the air spacing T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.0≦T12 / (T34+T45)≦2.0. By reasonably adjusting the specific values ​​of the air spacings between the above lenses, the system length of the optical imaging lens can be further shortened, and it is easy to process and manufacture, and the system configuration is optimized. More specifically, the air spacing T12 between the first lens and the second lens on the optical axis, the air spacing T34 between the third lens and the fourth lens on the optical axis, and the air spacing T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.01≦T12 / (T34+T45)≦1.99.

[0085] In the exemplary embodiment of the present application, the effective focal length f of the optical imaging lens, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy: 1.2≦(f4-f5) / f≦3.5. By reasonably allocating the optical focal length of the system, the system can have good imaging quality and reduce process sensitivity, thereby improving product yield. More specifically, the effective focal length f of the optical imaging lens, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy: 1.21≦(f4-f5) / f≦3.49.

[0086] In the exemplary embodiment of the present application, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the curvature radius R8 of the image side of the fourth lens, and the curvature radius R9 of the object side of the fifth lens satisfy: 2.0≦|f4 / R8|+|f5 / R9|≦5.0. By reasonably adjusting the effective focal length and curvature radius between the fourth lens and the fifth lens, the angle between the light and the optical axis can be effectively reduced, so that the light emitted is convenient for the subsequent system to correct aberrations. More specifically, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the curvature radius R8 of the image side of the fourth lens, and the curvature radius R9 of the object side of the fifth lens satisfy: 2.01≦|f4 / R8|+|f5 / R9|≦4.99.

[0087] In an exemplary embodiment of the present application, the radius of curvature R7 of the object side of the fourth lens and the radius of curvature R8 of the image side of the fourth lens satisfy: 1.5≦(R7+R8) / (R7-R8)≦3.0. By rationally configuring the radius of curvature of the object side and the image side of the fourth lens at the optical axis, the shape of the fourth lens will not be excessively curved. While the fourth lens corrects the astigmatism of the optical system, the tolerance sensitivity of the fourth lens can be reduced, thereby improving the molding yield of the fifth lens. More specifically, the radius of curvature R7 of the object side of the fourth lens and the radius of curvature R8 of the image side of the fourth lens satisfy: 1.50≦(R7+R8) / (R7-R8)≦2.99.

[0088] In the exemplary embodiment of the present application, the center thickness CT3 of the third lens on the optical axis and the center thickness CT5 of the fifth lens on the optical axis satisfy: 1.5≦CT5 / CT3≦3.0. By reasonably adjusting the center thickness of the third lens and the fifth lens, the third lens and the fifth lens are easy to process and manufacture, and the overall performance is improved. More specifically, the center thickness CT3 of the third lens on the optical axis and the center thickness CT5 of the fifth lens on the optical axis satisfy: 1.51≦CT5 / CT3≦2.99.

[0089] In an exemplary embodiment of the present application, the sum of the air intervals ∑AT on the optical axis between any two adjacent lenses with optical power between the first lens to the fifth lens and the sum of the center thicknesses ∑CT of all lenses on the optical axis satisfy: 2.5≦ΣCT / ΣAT≦3.8. By reasonably adjusting the air intervals between the lenses and the center thicknesses of the lenses, the optical imaging lens can simultaneously meet the requirements of lightweight design and miniaturization design. More specifically, the sum of the air intervals ∑AT on the optical axis between any two adjacent lenses with optical power between the first lens to the fifth lens and the sum of the center thicknesses ∑CT of all lenses on the optical axis satisfy: 2.51≦ΣCT / ΣAT≦3.79.

[0090] In the exemplary embodiment of the present application, the effective focal length f5 of the fifth lens and the curvature radius R10 of the image side of the fifth lens satisfy: 2.0≦|f5 / R10|≦5.0. By reasonably adjusting the effective focal length and curvature radius of the fifth lens, the temperature drift of the optical imaging lens can be controlled. More specifically, the effective focal length f5 of the fifth lens and the curvature radius R10 of the image side of the fifth lens satisfy: 2.01≦|f5 / R10|≦4.99.

[0091] In an exemplary embodiment of the present application, the effective focal length f of the optical imaging lens and the half of the maximum field of view of the optical imaging lens, Semi-FOV, satisfy: 3.5≦f×tan(Semi-FOV)≦4.3. By reasonably adjusting the effective focal length of the optical imaging lens and half of the maximum field of view, the structure of the optical imaging lens can be miniaturized and have a larger field of view, which is also beneficial for correcting aberrations. More specifically, the effective focal length f of the optical imaging lens and the half of the maximum field of view of the optical imaging lens, Semi-FOV, satisfy: 3.51≦f×tan(Semi-FOV)≦4.29.

[0092] In the exemplary embodiment of the present application, the maximum effective radius SD11 of the object side surface of the first lens and the center thickness CT1 of the first lens on the optical axis: satisfy: 3.5≦SD11 / CT1≦5.0. By reasonably adjusting the effective radius and center thickness of the object side, the first lens is easy to manufacture and improves the overall performance. More specifically, the maximum effective radius SD11 of the object side surface of the first lens and the center thickness CT1 of the first lens on the optical axis: satisfy: 3.51≦SD11 / CT1≦4.99.

[0093] In an exemplary embodiment of the present application, the distance SD from the aperture to the image side of the fifth lens, the axial distance TTL from the object side of the first lens to the imaging surface, the effective focal length f of the optical imaging lens, and the entrance pupil diameter EPD of the optical imaging lens satisfy: 8.5≦SD×TTL / (f×EPD)≦10.0. By reasonably adjusting the specific values ​​of the above SD, TTL, f and EPD, the lens structure can be miniaturized, and a suitable entrance pupil diameter can ensure sufficient light input, thereby indirectly improving the imaging quality. More specifically, the distance SD from the aperture to the image side of the fifth lens, the axial distance TTL from the object side of the first lens to the imaging surface, the effective focal length f of the optical imaging lens, and the entrance pupil diameter EPD of the optical imaging lens satisfy: 8.51≦SD×TTL / (f×EPD)≦9.99.

[0094] In the exemplary embodiment of the present application, the vertical distance Yc31 between the inflection point on the object side of the third lens and the optical axis and the center thickness CT3 of the third lens on the optical axis satisfy: 1.0≦Yc31 / CT3≦1.6. By reasonably adjusting the specific values ​​of the above Yc31 and CT3, it is beneficial to make the refractive power configuration of each field of view more uniform, thereby helping to improve the imaging quality of the optical system. More specifically, the vertical distance Yc31 between the inflection point on the object side of the third lens and the optical axis and the center thickness CT3 of the third lens on the optical axis satisfy: 1.01≦Yc31 / CT3≦1.59.

[0095] In this exemplary embodiment, the object side surface and the image side surface of any lens of the first lens E1 to the fifth lens E5 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0096]

[0097] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1); k is the cone coefficient; Ai is the correction coefficient of the i-th order aspheric surface.

[0098] In this exemplary embodiment, the optical imaging lens may further include a stop. The stop may be disposed at an appropriate position as required, for example, the stop may be disposed between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0099] The optical imaging lens according to the above embodiment of the present application can use multiple lenses, such as the above five lenses. By reasonably allocating the focal length, surface shape, center thickness of each lens, and axial spacing between lenses, the optical imaging lens has a larger imaging surface, a wide imaging range, and high imaging quality, and ensures the ultra-thinness of the mobile phone.

[0100] In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side of the first lens to the image side of the fifth lens is an aspherical mirror surface. The characteristics of an aspherical lens are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens and the fifth lens is an aspherical mirror surface.

[0101] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although five lenses are described as an example in the embodiments, the optical imaging lens is not limited to including five lenses, and the optical imaging lens may also include other numbers of lenses if necessary.

[0102] Specific embodiments of the optical imaging lens applicable to the above embodiments are further described below with reference to the accompanying drawings. Specific embodiment 1

[0104] Figure 1 Schematic diagram of the lens group structure of the optical imaging lens embodiment 1 of the present application. The optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0105] The first lens E1 has negative optical power, and its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has positive optical power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative optical power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive optical power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative optical power, and its object side surface S9 is convex, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface of surfaces S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0106] As shown in Table 1, it is a basic parameter table of the optical imaging lens of Example 1, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0107]

[0108] Table 1

[0109] As shown in Table 2, in Example 1, the total effective focal length of the optical imaging lens is f=2.17 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens is 5.20 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 is ImgH=2.93 mm, and half of the maximum field of view of the optical imaging system is Semi-FOV=59.85°.

[0110]

[0111] Table 2

[0112] The optical imaging lens in Example 1 satisfies:

[0113] FOV = 119.70°, where FOV is the maximum field of view of the optical imaging lens.

[0114] Semi-FOV=59.85°, where Semi-FOV is half of the maximum field of view of the optical imaging lens.

[0115] V4-V5=27.30, wherein V4 is the Abbe number of the fourth lens, and V5 is the Abbe number of the fifth lens.

[0116] TTL / ImgH=1.77, where TTL is the axial distance from the object side of the first lens to the imaging plane, and ImgH is half of the diagonal length of the effective pixel area on the imaging plane.

[0117] T34 / T45=1.82, wherein T34 is the air space between the third lens and the fourth lens on the optical axis, and T45 is the air space between the fourth lens and the fifth lens on the optical axis.

[0118] T12 / (T34+T45)=1.49, wherein T12 is the air interval between the first lens and the second lens on the optical axis, T34 is the air interval between the third lens and the fourth lens on the optical axis, and T45 is the air interval between the fourth lens and the fifth lens on the optical axis.

[0119] (f4-f5) / f=1.68, wherein f is the effective focal length of the optical imaging system, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens.

[0120] |f4 / R8|+|f5 / R9|=2.39, wherein f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, R8 is the radius of curvature of the image side of the fourth lens, and R9 is the radius of curvature of the object side of the fifth lens.

[0121] (R7+R8) / (R7-R8)=1.66, wherein R7 is the radius of curvature of the object side surface of the fourth lens, and R8 is the radius of curvature of the image side surface of the fourth lens.

[0122] CT5 / CT3=1.62, wherein CT3 is the center thickness of the third lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis.

[0123] ΣCT / ΣAT=3.39, wherein ΣAT is the sum of the air intervals on the optical axis between any two adjacent lenses with optical power from the first lens to the lens closest to the imaging surface, and ΣCT is the sum of the center thicknesses of all lenses on the optical axis.

[0124] |f5 / R10|=2.59, wherein f5 is the effective focal length of the fifth lens element, and R10 is the radius of curvature of the image side surface of the fifth lens element.

[0125] f×tan(Semi-FOV)=3.74, where f is the effective focal length of the optical imaging system, and Semi-FOV is half of the maximum field of view of the optical imaging lens.

[0126] SD11 / CT1=4.05, wherein SD11 is the maximum effective radius of the object-side surface of the first lens, and CT1 is the center thickness of the first lens on the optical axis.

[0127] SD×TTL / (f×EPD)=8.76, where SD is the distance from the aperture to the image side of the last lens, TTL is the axial distance from the object side of the first lens to the imaging surface, f is the effective focal length of the optical imaging system, and EPD is the entrance pupil diameter of the optical imaging system.

[0128] Yc31 / CT3=1.30, wherein Yc31 is the vertical distance between the inflection point of the object side surface of the third lens and the optical axis, and CT3 is the center thickness of the third lens on the optical axis.

[0129] In Example 1, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 3 shows high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each aspherical mirror surface S1-S10 in Example 1.

[0130]

[0131]

[0132] Table 3

[0133] Figure 2a The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 2b The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 2c The magnification chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figure 2a to Figure 2c It can be seen from the figure that the optical imaging lens provided in Example 1 can achieve good imaging quality. Specific embodiment 2

[0135] Figure 3 Schematic diagram of the lens group structure of the optical imaging lens embodiment 2 of the present application. The optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0136] The first lens E1 has negative optical power, and its object side surface S1 is concave, and its image side surface S2 is convex. The second lens E2 has positive optical power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative optical power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive optical power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative optical power, and its object side surface S9 is convex, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface of surfaces S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0137] As shown in Table 4, it is a basic parameter table of the optical imaging lens of Example 2, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0138]

[0139] Table 4

[0140] As shown in Table 5, in Example 2, the total effective focal length of the optical imaging lens is f=2.10 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens is 5.20 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 is ImgH=2.93 mm, and half of the maximum field of view of the optical imaging system is Semi-FOV=60.05°.

[0141]

[0142] Table 5

[0143] The optical imaging lens in Example 2 satisfies:

[0144] FOV = 120.10°, where FOV is the maximum field of view of the optical imaging lens.

[0145] Semi-FOV=60.05°, where Semi-FOV is half of the maximum field of view of the optical imaging lens.

[0146] V4-V5=28.90, wherein V4 is the Abbe number of the fourth lens, and V5 is the Abbe number of the fifth lens.

[0147] TTL / ImgH=1.77, where TTL is the axial distance from the object side of the first lens to the imaging plane, and ImgH is half of the diagonal length of the effective pixel area on the imaging plane.

[0148] T34 / T45=1.46, wherein T34 is the air space between the third lens and the fourth lens on the optical axis, and T45 is the air space between the fourth lens and the fifth lens on the optical axis.

[0149] T12 / (T34+T45)=1.42, wherein T12 is the air interval between the first lens and the second lens on the optical axis, T34 is the air interval between the third lens and the fourth lens on the optical axis, and T45 is the air interval between the fourth lens and the fifth lens on the optical axis.

[0150] (f4-f5) / f=2.32, wherein f is the effective focal length of the optical imaging system, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens.

[0151] |f4 / R8|+|f5 / R9|=3.16, wherein f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, R8 is the radius of curvature of the image side of the fourth lens, and R9 is the radius of curvature of the object side of the fifth lens.

[0152] (R7+R8) / (R7-R8)=2.17, wherein R7 is the radius of curvature of the object side surface of the fourth lens, and R8 is the radius of curvature of the image side surface of the fourth lens.

[0153] CT5 / CT3=1.75, wherein CT3 is the center thickness of the third lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis.

[0154] ΣCT / ΣAT=2.97, wherein ΣAT is the sum of the air intervals on the optical axis between any two adjacent lenses with optical power from the first lens to the lens closest to the imaging surface, and ΣCT is the sum of the center thicknesses of all lenses on the optical axis.

[0155] |f5 / R10|=3.29, wherein f5 is the effective focal length of the fifth lens element, and R10 is the radius of curvature of the image side surface of the fifth lens element.

[0156] f×tan(Semi-FOV)=3.65, where f is the effective focal length of the optical imaging system, and Semi-FOV is half of the maximum field of view of the optical imaging lens.

[0157] SD11 / CT1=4.65, wherein SD11 is the maximum effective radius of the object-side surface of the first lens, and CT1 is the center thickness of the first lens on the optical axis.

[0158] SD×TTL / (f×EPD)=9.26, where SD is the distance from the aperture to the image side of the last lens, TTL is the axial distance from the object side of the first lens to the imaging surface, f is the effective focal length of the optical imaging system, and EPD is the entrance pupil diameter of the optical imaging system.

[0159] Yc31 / CT3=1.28, wherein Yc31 is the vertical distance between the inflection point of the object side surface of the third lens and the optical axis, and CT3 is the center thickness of the third lens on the optical axis.

[0160] In Example 2, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 6 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of the aspherical mirror surfaces S1-S10 that can be used in Example 2.

[0161]

[0162]

[0163] Table 6

[0164] Figure 4a The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 4b The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 4c The magnification chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 4a to 4c It can be seen from the figure that the optical imaging lens provided in Example 2 can achieve good imaging quality. Specific embodiment 3

[0166] Figure 5 Schematic diagram of the lens group structure of the optical imaging lens embodiment 3 of the present application. The optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0167] The first lens E1 has negative optical power, and its object side surface S1 is concave, and its image side surface S2 is convex. The second lens E2 has positive optical power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative optical power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive optical power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative optical power, and its object side surface S9 is convex, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface of surfaces S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0168] As shown in Table 7, it is a basic parameter table of the optical imaging lens of Example 3, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0169]

[0170]

[0171] Table 7

[0172] As shown in Table 8, in Example 3, the total effective focal length of the optical imaging lens is f=2.13 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens is 5.14 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 is ImgH=3.05 mm, and half of the maximum field of view of the optical imaging system is Semi-FOV=62.19°.

[0173]

[0174] Table 8

[0175] The optical imaging lens in Example 3 satisfies:

[0176] FOV = 124.38°, where FOV is the maximum field of view of the optical imaging lens.

[0177] Semi-FOV=62.19°, where Semi-FOV is half of the maximum field of view of the optical imaging lens.

[0178] V4-V5=28.90, wherein V4 is the Abbe number of the fourth lens, and V5 is the Abbe number of the fifth lens.

[0179] TTL / ImgH=1.69, where TTL is the axial distance from the object side of the first lens to the imaging plane, and ImgH is half of the diagonal length of the effective pixel area on the imaging plane.

[0180] T34 / T45=1.90, wherein T34 is the air space between the third lens and the fourth lens on the optical axis, and T45 is the air space between the fourth lens and the fifth lens on the optical axis.

[0181] T12 / (T34+T45)=1.42, wherein T12 is the air interval between the first lens and the second lens on the optical axis, T34 is the air interval between the third lens and the fourth lens on the optical axis, and T45 is the air interval between the fourth lens and the fifth lens on the optical axis.

[0182] (f4-f5) / f=2.49, wherein f is the effective focal length of the optical imaging system, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens.

[0183] |f4 / R8|+|f5 / R9|=3.61, wherein f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, R8 is the radius of curvature of the image side of the fourth lens, and R9 is the radius of curvature of the object side of the fifth lens.

[0184] (R7+R8) / (R7-R8)=2.43, wherein R7 is the radius of curvature of the object side surface of the fourth lens, and R8 is the radius of curvature of the image side surface of the fourth lens.

[0185] CT5 / CT3=1.84, wherein CT3 is the center thickness of the third lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis.

[0186] ΣCT / ΣAT=2.99, wherein ΣAT is the sum of the air intervals on the optical axis between any two adjacent lenses with optical power from the first lens to the lens closest to the imaging surface, and ΣCT is the sum of the center thicknesses of all lenses on the optical axis.

[0187] |f5 / R10|=3.76, wherein f5 is the effective focal length of the fifth lens element, and R10 is the radius of curvature of the image side surface of the fifth lens element.

[0188] f×tan(Semi-FOV)=4.03, where f is the effective focal length of the optical imaging system, and Semi-FOV is half of the maximum field of view of the optical imaging lens.

[0189] SD11 / CT1=4.83, wherein SD11 is the maximum effective radius of the object-side surface of the first lens, and CT1 is the center thickness of the first lens on the optical axis.

[0190] SD×TTL / (f×EPD)=8.87, where SD is the distance from the aperture to the image side of the last lens, TTL is the axial distance from the object side of the first lens to the imaging surface, f is the effective focal length of the optical imaging system, and EPD is the entrance pupil diameter of the optical imaging system.

[0191] Yc31 / CT3=1.38, wherein Yc31 is the vertical distance between the inflection point of the object side surface of the third lens and the optical axis, and CT3 is the center thickness of the third lens on the optical axis.

[0192] In Example 3, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 9 shows high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each aspherical mirror surface S1-S10 in Example 3.

[0193]

[0194]

[0195] Table 9

[0196] Figure 6a The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 6b The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 6c The magnification chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 6a to 6c It can be seen from the figure that the optical imaging lens provided in Example 3 can achieve good imaging quality. Specific embodiment 4

[0198] Figure 7 Schematic diagram of the lens group structure of the optical imaging lens embodiment 4 of the present application. The optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0199] The first lens E1 has negative optical power, and its object side surface S1 is concave, and its image side surface S2 is convex. The second lens E2 has positive optical power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative optical power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive optical power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative optical power, and its object side surface S9 is convex, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface of surfaces S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0200] As shown in Table 10, it is a basic parameter table of the optical imaging lens of Example 4, wherein the units of the curvature radius, thickness, and focal length are all millimeters (mm).

[0201]

[0202]

[0203] Table 10

[0204] As shown in Table 11, in Example 4, the total effective focal length of the optical imaging lens is f=2.08 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens is 5.14 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 is ImgH=3.05 mm, and half of the maximum field of view of the optical imaging system is Semi-FOV=62.18°.

[0205]

[0206] Table 11

[0207] The optical imaging lens in Example 4 satisfies:

[0208] FOV = 124.36°, where FOV is the maximum field of view of the optical imaging lens.

[0209] Semi-FOV=62.18°, where Semi-FOV is half of the maximum field of view of the optical imaging lens.

[0210] V4-V5=30.10, wherein V4 is the Abbe number of the fourth lens, and V5 is the Abbe number of the fifth lens.

[0211] TTL / ImgH=1.69, where TTL is the axial distance from the object side of the first lens to the imaging plane, and ImgH is half of the diagonal length of the effective pixel area on the imaging plane.

[0212] T34 / T45=1.71, wherein T34 is the air space between the third lens and the fourth lens on the optical axis, and T45 is the air space between the fourth lens and the fifth lens on the optical axis.

[0213] T12 / (T34+T45)=1.37, wherein T12 is the air interval between the first lens and the second lens on the optical axis, T34 is the air interval between the third lens and the fourth lens on the optical axis, and T45 is the air interval between the fourth lens and the fifth lens on the optical axis.

[0214] (f4-f5) / f=2.90, wherein f is the effective focal length of the optical imaging system, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens.

[0215] |f4 / R8|+|f5 / R9|=4.51, wherein f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, R8 is the radius of curvature of the image side of the fourth lens, and R9 is the radius of curvature of the object side of the fifth lens.

[0216] (R7+R8) / (R7-R8)=2.62, wherein R7 is the radius of curvature of the object side surface of the fourth lens, and R8 is the radius of curvature of the image side surface of the fourth lens.

[0217] CT5 / CT3=1.77, wherein CT3 is the center thickness of the third lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis.

[0218] ΣCT / ΣAT=2.84, wherein ΣAT is the sum of the air intervals on the optical axis between any two adjacent lenses with optical power from the first lens to the lens closest to the imaging surface, and ΣCT is the sum of the center thicknesses of all lenses on the optical axis.

[0219] |f5 / R10|=4.79, wherein f5 is the effective focal length of the fifth lens element, and R10 is the radius of curvature of the image side surface of the fifth lens element.

[0220] f×tan(Semi-FOV)=3.95, where f is the effective focal length of the optical imaging system, and Semi-FOV is half of the maximum field of view of the optical imaging lens.

[0221] SD11 / CT1=4.82, wherein SD11 is the maximum effective radius of the object-side surface of the first lens, and CT1 is the center thickness of the first lens on the optical axis.

[0222] SD×TTL / (f×EPD)=9.18, where SD is the distance from the aperture to the image side of the last lens, TTL is the axial distance from the object side of the first lens to the imaging surface, f is the effective focal length of the optical imaging system, and EPD is the entrance pupil diameter of the optical imaging system.

[0223] Yc31 / CT3=1.38, wherein Yc31 is the vertical distance between the inflection point of the object side surface of the third lens and the optical axis, and CT3 is the center thickness of the third lens on the optical axis.

[0224] In Example 4, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 12 shows high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of the aspherical mirror surfaces S1-S10 that can be used in Example 4.

[0225]

[0226]

[0227] Table 12

[0228] Figure 8a The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 8b The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 8c The magnification chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 8a to 8c It can be seen from the figure that the optical imaging lens provided in Example 4 can achieve good imaging quality. Specific embodiment 5

[0230] Fig. 9 Schematic diagram of the lens group structure of the optical imaging lens embodiment 5 of the present application. The optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an imaging surface S13.

[0231] The first lens E1 has negative optical power, and its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has positive optical power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative optical power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive optical power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative optical power, and its object side surface S9 is convex, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface of surfaces S1 to S12 in sequence and is finally imaged on the imaging surface S13.

[0232] As shown in Table 13, it is a basic parameter table of the optical imaging lens of Example 5, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0233]

[0234]

[0235] Table 13

[0236] As shown in Table 14, in Example 5, the total effective focal length of the optical imaging lens is f=2.06 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 of the optical imaging lens is 5.14 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 is ImgH=3.05 mm, and half of the maximum field of view of the optical imaging system is Semi-FOV=62.43°.

[0237]

[0238] Table 14

[0239] The optical imaging lens in Example 5 satisfies:

[0240] FOV = 124.86°, where FOV is the maximum field of view of the optical imaging lens.

[0241] Semi-FOV=62.43°, where Semi-FOV is half of the maximum field of view of the optical imaging lens.

[0242] V4-V5=30.10, wherein V4 is the Abbe number of the fourth lens, and V5 is the Abbe number of the fifth lens.

[0243] TTL / ImgH=1.68, where TTL is the axial distance from the object side of the first lens to the imaging plane, and ImgH is half of the diagonal length of the effective pixel area on the imaging plane.

[0244] T34 / T45=2.77, wherein T34 is the air space between the third lens and the fourth lens on the optical axis, and T45 is the air space between the fourth lens and the fifth lens on the optical axis.

[0245] T12 / (T34+T45)=1.32, wherein T12 is the air interval between the first lens and the second lens on the optical axis, T34 is the air interval between the third lens and the fourth lens on the optical axis, and T45 is the air interval between the fourth lens and the fifth lens on the optical axis.

[0246] (f4-f5) / f=3.19, wherein f is the effective focal length of the optical imaging system, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens.

[0247] |f4 / R8|+|f5 / R9|=4.19, wherein f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, R8 is the radius of curvature of the image side of the fourth lens, and R9 is the radius of curvature of the object side of the fifth lens.

[0248] (R7+R8) / (R7-R8)=2.28, wherein R7 is the radius of curvature of the object side surface of the fourth lens, and R8 is the radius of curvature of the image side surface of the fourth lens.

[0249] CT5 / CT3=2.57, wherein CT3 is the center thickness of the third lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis.

[0250] ΣCT / ΣAT=3.51, wherein ΣAT is the sum of the air intervals on the optical axis between any two adjacent lenses with optical power from the first lens to the lens closest to the imaging surface, and ΣCT is the sum of the center thicknesses of all lenses on the optical axis.

[0251] |f5 / R10|=4.61, wherein f5 is the effective focal length of the fifth lens element, and R10 is the radius of curvature of the image side surface of the fifth lens element.

[0252] f×tan(Semi-FOV)=3.95, where f is the effective focal length of the optical imaging system, and Semi-FOV is half of the maximum field of view of the optical imaging lens.

[0253] SD11 / CT1=3.96, wherein SD11 is the maximum effective radius of the object-side surface of the first lens, and CT1 is the center thickness of the first lens on the optical axis.

[0254] SD×TTL / (f×EPD)=9.73, where SD is the distance from the aperture to the image side of the last lens, TTL is the axial distance from the object side of the first lens to the imaging surface, f is the effective focal length of the optical imaging system, and EPD is the entrance pupil diameter of the optical imaging system.

[0255] Yc31 / CT3=1.25, wherein Yc31 is the vertical distance between the inflection point of the object side surface of the third lens and the optical axis, and CT3 is the center thickness of the third lens on the optical axis.

[0256] In Example 5, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 15 shows high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 of the aspherical mirror surfaces S1-S10 that can be used in Example 5.

[0257]

[0258]

[0259] Table 15

[0260] Fig.10a The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig.10b The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.10c The magnification chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 10a to 10c It can be seen from the figure that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0261] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, improvements, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An optical imaging lens, characterized in that: The optical imaging lens has five lenses with optical power, and the optical imaging lens includes, in order from the object side to the image side along the optical axis: A first lens having negative optical power, whose object side surface is concave; a second lens having positive refractive power, whose object side surface is convex and whose image side surface is convex; A third lens having negative optical power, whose object side is convex and image side is concave; a fourth lens element having positive refractive power, whose object side surface is concave and image side surface is convex; a fifth lens element having negative optical power, whose object side surface is convex and whose image side surface is concave; Wherein, there is an air gap between adjacent lenses; Wherein, the lens material of the fourth lens and / or the fifth lens is molded glass; Among them, the maximum field of view FOV of the optical imaging lens satisfies: 119.7°≤FOV≤124.86°; The air interval T12 between the first lens and the second lens on the optical axis, the air interval T34 between the third lens and the fourth lens on the optical axis, and the air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.32≦T12 / (T34+T45)≦1.49; The sum ΣAT of the air intervals on the optical axis between any two adjacent lenses having optical power between the first lens to the fifth lens and the sum ΣCT of the center thicknesses of all the lenses on the optical axis satisfy: 2.84≦ΣCT / ΣAT≦3.

51.

2. The optical imaging lens according to claim 1, wherein: The axial distance TTL from the object side of the first lens to the imaging plane and the half of the diagonal length of the effective pixel area on the imaging plane ImgH satisfy: 1.68≦TTL / ImgH≦1.

77.

3. The optical imaging lens according to claim 1, wherein: The air interval T34 between the third lens and the fourth lens on the optical axis and the air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.46≦T34 / T45≦2.

77.

4. The optical imaging lens according to claim 1, wherein: The effective focal length f of the optical imaging lens, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy: 1.68≦(f4-f5) / f≦3.

19.

5. The optical imaging lens according to claim 1, wherein: The effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the curvature radius R8 of the image side surface of the fourth lens, and the curvature radius R9 of the object side surface of the fifth lens satisfy: 2.39≦|f4 / R8|+|f5 / R9|≦4.

51.

6. The optical imaging lens according to claim 1, wherein: A curvature radius R7 of the object side surface of the fourth lens and a curvature radius R8 of the image side surface of the fourth lens satisfy: 1.66≦(R7+R8) / (R7-R8)≦2.

62.

7. The optical imaging lens according to claim 1, wherein: A center thickness CT3 of the third lens on the optical axis and a center thickness CT5 of the fifth lens on the optical axis satisfy: 1.62≦CT5 / CT3≦2.

57.

8. The optical imaging lens according to claim 1, wherein: The effective focal length f5 of the fifth lens and the curvature radius R10 of the image-side surface of the fifth lens satisfy: 2.59≦|f5 / R10|≦4.

79.

9. The optical imaging lens according to claim 1, wherein: The effective focal length f of the optical imaging lens and half of the maximum field of view Semi-FOV of the optical imaging lens satisfy: 3.65≦f×tan(Semi-FOV)≦4.

03.

10. The optical imaging lens according to claim 1, wherein: The maximum effective radius SD11 of the object-side surface of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy: 3.96≦SD11 / CT1≦4.

83.

11. The optical imaging lens according to claim 1, wherein: The distance SD from the aperture to the image side surface of the fifth lens, the axial distance TTL from the object side surface of the first lens to the imaging surface, the effective focal length f of the optical imaging lens, and the entrance pupil diameter EPD of the optical imaging lens satisfy: 8.76≦SD×TTL / (f×EPD)≦9.

73.

12. The optical imaging lens according to claim 1, wherein: A vertical distance Yc31 between the inflection point of the object side surface of the third lens and the optical axis and a center thickness CT3 of the third lens on the optical axis satisfy: 1.25≦Yc31 / CT3≦1.

38.

13. An optical imaging lens, characterized in that: the optical imaging lens has five lenses with optical power, and the optical imaging lens includes, in order from the object side to the image side along the optical axis: A first lens having negative optical power, whose object side surface is concave; a second lens having positive refractive power, whose object side surface is convex and whose image side surface is convex; A third lens having negative optical power, whose object side is convex and image side is concave; a fourth lens having positive refractive power, whose object-side surface is concave and whose image-side surface is convex; a fifth lens element having negative optical power, whose object side surface is convex and whose image side surface is concave; Wherein, there is an air gap between adjacent lenses; Wherein, half of the maximum field of view angle Semi-FOV of the optical imaging lens satisfies: 59.8°≤Semi-FOV≤62.42°; The Abbe number V4 of the fourth lens and the Abbe number V5 of the fifth lens satisfy: 27.3≤V4-V5≤30.1; The air interval T12 between the first lens and the second lens on the optical axis, the air interval T34 between the third lens and the fourth lens on the optical axis, and the air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.32≦T12 / (T34+T45)≦1.49; The sum ΣAT of the air intervals on the optical axis between any two adjacent lenses having optical power between the first lens to the fifth lens and the sum ΣCT of the center thicknesses of all the lenses on the optical axis satisfy: 2.84≦ΣCT / ΣAT≦3.

51.

14. The optical imaging lens according to claim 13, wherein: The axial distance TTL from the object side of the first lens to the imaging plane and the half of the diagonal length of the effective pixel area on the imaging plane ImgH satisfy: 1.68≦TTL / ImgH≦1.

77.

15. The optical imaging lens according to claim 13, wherein: The air interval T34 between the third lens and the fourth lens on the optical axis and the air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.46≦T34 / T45≦2.

77.

16. The optical imaging lens according to claim 13, wherein: The effective focal length f of the optical imaging lens, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy: 1.68≦(f4-f5) / f≦3.

19.

17. The optical imaging lens according to claim 13, wherein: The effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the curvature radius R8 of the image side surface of the fourth lens, and the curvature radius R9 of the object side surface of the fifth lens satisfy: 2.39≦|f4 / R8|+|f5 / R9|≦4.

51.

18. The optical imaging lens according to claim 13, wherein: A curvature radius R7 of the object side surface of the fourth lens and a curvature radius R8 of the image side surface of the fourth lens satisfy: 1.66≦(R7+R8) / (R7-R8)≦2.

62.

19. The optical imaging lens according to claim 13, wherein: A center thickness CT3 of the third lens on the optical axis and a center thickness CT5 of the fifth lens on the optical axis satisfy: 1.62≦CT5 / CT3≦2.

57.

20. The optical imaging lens according to claim 13, wherein: The effective focal length f5 of the fifth lens and the curvature radius R10 of the image-side surface of the fifth lens satisfy: 2.59≦|f5 / R10|≦4.

79.

21. The optical imaging lens according to claim 13, wherein: The effective focal length f of the optical imaging lens and half of the maximum field of view Semi-FOV of the optical imaging lens satisfy: 3.65≦f×tan(Semi-FOV)≦4.

03.

22. The optical imaging lens according to claim 13, wherein: The maximum effective radius SD11 of the object-side surface of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy: 3.96≦SD11 / CT1≦4.

83.

23. The optical imaging lens according to claim 13, wherein: The distance SD from the aperture to the image side surface of the fifth lens, the axial distance TTL from the object side surface of the first lens to the imaging surface, the effective focal length f of the optical imaging lens, and the entrance pupil diameter EPD of the optical imaging lens satisfy: 8.76≦SD×TTL / (f×EPD)≦9.

73.

24. The optical imaging lens according to claim 13, wherein: A vertical distance Yc31 between the inflection point of the object side surface of the third lens and the optical axis and a center thickness CT3 of the third lens on the optical axis satisfy: 1.25≦Yc31 / CT3≦1.38.

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